I need an idea for a costume for my twin sister and me. Preferably Disney, and cute ideas! Please answer.?

We have already done Thing 1 and Thing 2, 101 Dalmation, and the Gosselins. It needs to be cute and funny. We have thought about Pebbles and Bam-Bam and Russel and Kevin from UP. Do you like that? We weren't sure, just need ideas! Thanks!